Droplet generation

Details Droplet generation Droplet generation

A - Human Necessities

61

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167/104, 167/164

A61K 9/50 (2006.01) A61K 9/16 (2006.01) A61K 35/12 (2006.01) A61K 35/39 (2006.01) B01J 2/02 (2006.01) B01J 2/08 (2006.01) B01J 13/04 (2006.01) B01J 13/08 (2006.01) G01N 15/14 (2006.01)

Patent

CA 1241598

24 ABSTRACT OF THE DISCLOSURE Perfectly spherical, smooth and uniform microcapsules, which may contain living cells, are produced having a diameter less than 700 µm by employing an electrostatic droplet generator. A droplet is suspended from a pointed source, such as a needle, and is charged with high static voltage. A collecting vessel or ring device is charged with opposing polarity and attracts the droplet. When a voltage potential threshold is passed, the droplet moves from the source to the collecting vessel. The voltage pulse height, pulse frequency and length, and extrusion rate of the droplet are adjustable so that predetermined sizes of droplets may be repeatedly generated and collected.

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